So, that may have been the problem all along.Be Free wrote: ↑Fri May 29, 2026 8:15 am The three cylinder Hondas run surprisingly well on just two cylinders. The idle will drop and the engine runs just a tiny bit rougher.
If one cylinder was not firing then some of the unburnt fuel could easily have leaked past the rings and diluted the oil in the crankcase.
Is it possible that a non-firing cylinder could cause the scraping/rubbing noise?